1. All About Health. Out of stock notice board. 30 March 2020. https://www.aah.co.uk/resource/blob/30378/32b6d37e991450ca3aac9860ac01c1f4/aah-out-of-stock-pharmacy-and-dispensing-doctors-data.pdf
2. British Thoracic Society. BTS information: respiratory Inhalers. March 2020. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=2ahUKEwiz5o7llMzoAhXJOcAKHfB2ADIQFjAAegQIAxAB&url=https%3A%2F%2Fwww.brit-thoracic.org.uk%2Fdocument-library%2Fquality-improvement%2Fcovid-19%2Fbts-information-respiratory-inhalers%2F&usg=AOvVaw2ttii-mv6pKluwTh32v1A-
3. NHS England. 31 March 2020. https://www.england.nhs.uk/coronavirus/wp-content/uploads/sites/52/2020/03/C0114-_Pharmacy-letter_no.-3_31-March.pdf
4. Chiesi. Information for healthcare professionals on the supply of Chiesi products. https://www.chiesi.uk.com/supply-of-chiesi-products